Anonmonk, here is how but I can't see how this is related to Inline::C.
Case2 (pass a scalar - not a ref) is obviously failing. But I don't think that should apply to Inline::C because AFAICT a scalar, like a scalarref and any ref, is passed as an `SV *` which I can affect its PV field within `func()` and insert an arrayref in there. A good warmup though thanks.
`use strict;
use warnings;
use Test::More;
use Data::Dumper;
my $correct_result = make_a_rowsxcols_array(5,3);
print Dumper($correct_result);
### $#out = -1; # clears an array;
# Case1: pass it an arrayref
my $T = 'Case1';
my @out = (1,2,3);
is( case1(\@out), 0, "$T: returned success.");
is_deeply(\@out, $correct_result, "$T: correct result.");
# Case2: pass it a scalar
$T = 'Case2';
my $x = 123;
is( case2($x), 0, "$T: returned success.");
is_deeply($x, $correct_result, "$T: correct result.");
# Case3: pass it a scalarref
$T = 'Case3';
my $y = 123;
is( case3(\$y), 0, "$T: returned success.");
is_deeply($y, $correct_result, "$T: correct result.");
done_testing();
sub case1 {
# pass an arrayref, clear it and make it 5rowsx3cols
my $out = $_[0];
return 1 unless ref($out) eq 'ARRAY';
$#{ $out } = -1;
push @$out, @{ make_a_rowsxcols_array(5,3) };
return 0;
}
sub case2 {
# pass a simple scalar, make it an arrayref
my $out = $_[0];
return 1 unless ref($out) eq '';
$out = make_a_rowsxcols_array(5,3);
return 0;
}
sub case3 {
# pass a scalarref, fill it with an arrayref to 5rowsx3cols
my $out = $_[0];
return 1 unless ref($out) eq 'SCALAR';
undef $$out;
$$out = make_a_rowsxcols_array(5,3);
return 0;
}
sub make_a_rowsxcols_array {
[ map { [ (42)x$_[1] ] } 1..$_[0] ]
}
`
bw, bliako |
Comment onRe: Inline::C : passing parameters to functions, modifying by reference